Heating And Welding — Part 1 MCQs with Explanations

T4 is the correct answer to “Radiations from a black body are proportional to”. This question is standard in competitive examination syllabi for Heating And Welding.

Both (A) and (B) is the correct answer to “Properly of low temperature co-eflficient of heating element is desired due to which of the following reasons”. This question is standard in competitive examination syllabi for Heating And Welding.

High specific resistance is the correct answer to “The material of the heating element for a furnace should have”. This question is standard in competitive examination syllabi for Heating And Welding.

Frequency is the correct answer to “In induction heating __________ is abnormally high.”. This question is standard in competitive examination syllabi for Heating And Welding.

Temperature of the two bodies must be different is the correct answer to “For the transmission of heat from one body to another”. This question is standard in competitive examination syllabi for Heating And Welding.

White body is the correct answer to “When a body reflects entire radiation incident on it, then it is known as”. This question is standard in competitive examination syllabi for Heating And Welding.

Temperatures of the two bodies are identical is the correct answer to “Heat transfer by condition will not occur when”. This question is standard in competitive examination syllabi for Heating And Welding.

Absorbs all incident radiations is the correct answer to “A perfect black body is one that”. This question is standard in competitive examination syllabi for Heating And Welding.

Reduce the length of heating element is the correct answer to “For heating element high resistivity material is chosen to”. This question is standard in competitive examination syllabi for Heating And Welding.

Resistance heating is the correct answer to “Which of the following heating methods has maximum power factor”. This question is standard in competitive examination syllabi for Heating And Welding.

Graphite is the correct answer to “The electrode of a direct arc furnace is made of”. This question is standard in competitive examination syllabi for Heating And Welding.

As an insulator is the correct answer to “In an electric press mica is used”. This question is standard in competitive examination syllabi for Heating And Welding.

Oxidizing is the correct answer to “In a resistance furnace the atmosphere is”. This question is standard in competitive examination syllabi for Heating And Welding.

Motor-generator set is the correct answer to “By the use of which of the following, high frequency power supply for induction furnaces can be obtained”. This question is standard in competitive examination syllabi for Heating And Welding.

Optical pyrometer is the correct answer to “The temperature inside a furnace is usually measured by which of the following”. This question is standard in competitive examination syllabi for Heating And Welding.

Drying of paints and varnishes is the correct answer to “Radiant heating is used for which of the following”. This question is standard in competitive examination syllabi for Heating And Welding.

Heat treatment of castings is the correct answer to “Induction furnaces are employed for which of the following”. This question is standard in competitive examination syllabi for Heating And Welding.

Conducting materials which may or may not be magnetic is the correct answer to “Induction heating takes place in which of the following”. This question is standard in competitive examination syllabi for Heating And Welding.

good, bad is the correct answer to “In electric press, mica is used because it is _______ conductor of heat but/and________ conductor of electricity.”. This question is standard in competitive examination syllabi for Heating And Welding.

Resistance heating is the correct answer to “In an electric room heat convector the method of heating used is”. This question is standard in competitive examination syllabi for Heating And Welding.

All of the above is the correct answer to “Which of the following is an advantage of eddy current heating”. This question is standard in competitive examination syllabi for Heating And Welding.

Both (A) and (B) is the correct answer to “Properly of low temperature coefficient of heating element is desired due to which of the following reasons”. This question is standard in competitive examination syllabi for Heating And Welding.

Inside boiler furnaces is the correct answer to “Heat is transferred simultaneously by condition, convection and radiation”. This question is standard in competitive examination syllabi for Heating And Welding.

Tungsten alloy is the correct answer to “For radiant heating around 2250°C, the heating elements are made of”. This question is standard in competitive examination syllabi for Heating And Welding.

Induction heating of steel is the correct answer to “Hysteresis loss and eddy current loss are used in”. This question is standard in competitive examination syllabi for Heating And Welding.

Electric resistance heating is the correct answer to “Which of the following methods of heating is not dependent on the frequency of supply”. This question is standard in competitive examination syllabi for Heating And Welding.

To stabilize the arc is the correct answer to “In arc furnace the function of choke is”. This question is standard in competitive examination syllabi for Heating And Welding.

Conducting materials which may or may not be magnetic is the correct answer to “Induction heating takes place it which of the following”. This question is standard in competitive examination syllabi for Heating And Welding.

Copper is the correct answer to “________ has the highest value of thermal conductivity.”. This question is standard in competitive examination syllabi for Heating And Welding.

Solid ice is the correct answer to “Which of the following has the highest value of thermal conductivity”. This question is standard in competitive examination syllabi for Heating And Welding.

Silicon carbide is the correct answer to “In resistance heating highest working temperature is obtained from heating elements made of”. This question is standard in competitive examination syllabi for Heating And Welding.

Grashoff number is the correct answer to “A non-dimensional number generally associated with natural convection heat transfer is”. This question is standard in competitive examination syllabi for Heating And Welding.

Dielectric heating is the correct answer to “Method has leading power factor”. This question is standard in competitive examination syllabi for Heating And Welding.

Ablation is the correct answer to “The process of heat transfer during the re-entry of satellites and missiles, at very high speeds, into earth?s atmosphere is known as”. This question is standard in competitive examination syllabi for Heating And Welding.

It is filled above core level is the correct answer to “Ajax Wyatt furnace is started when”. This question is standard in competitive examination syllabi for Heating And Welding.

Radiation is the correct answer to “In the indirect resistance heating method, maximum heat-transfer takes place by”. This question is standard in competitive examination syllabi for Heating And Welding.

Electromagnetic induction principle is the correct answer to “Induction heating process is based on which of the following principles”. This question is standard in competitive examination syllabi for Heating And Welding.

Dielectric heating is the correct answer to “________ is used for heating non-conducting materials.”. This question is standard in competitive examination syllabi for Heating And Welding.

Thermocouple is the correct answer to “Which of the following devices is necessarily required for automatic temperature control in a furnace”. This question is standard in competitive examination syllabi for Heating And Welding.

Low, lagging is the correct answer to “Direct arc furnaces have which of the following power factors”. This question is standard in competitive examination syllabi for Heating And Welding.